Update crdoc image to v0.6.1

Use ubi8-based image provided with
https://github.com/fybrik/crdoc/pull/115

.gitlab-ci.yml

@@ -82,7 +82,7 @@ test-docs-links:
 build-docs-crds:
   stage: build
   image:
-    name: ghcr.io/fybrik/crdoc:0.6.0
+    name: ghcr.io/fybrik/crdoc:0.6.1
     entrypoint: [""]
   script: /crdoc --resources theodolite/crd/ --template docs/api-reference/crds.tmpl --output docs/api-reference/crds.ref.md
   artifacts:

docs/README.md

@@ -39,5 +39,5 @@ crdoc --resources ../theodolite/crd/ --template api-reference/crds.tmpl  --outpu
 With the following command, crdoc is executed in Docker:
 
 ```sh
-docker run --rm -v "`pwd`/../theodolite/crd/":/crd -u $UID -v "`pwd`/api-reference":/api-reference ghcr.io/fybrik/crdoc:0.6.0 --resources /crd/ --template /api-reference/crds.tmpl --output /api-reference/crds.md
+docker run --rm -v "`pwd`/../theodolite/crd/":/crd -v "`pwd`/api-reference":/api-reference ghcr.io/fybrik/crdoc:0.6.1 --resources /crd/ --template /api-reference/crds.tmpl --output /api-reference/crds.md
 ```